Artifacts

Visual music theory site that shows harmony as colored flags and piano-roll views of songs.

Technical ear training exercises aimed at audio work, from an open-source project.

Drag-and-drop block coding for Arduino with a simulator for the circuit.

Interactive demo of how model complexity trades bias against variance.

Animated explanation of k-fold cross-validation and why it is used.

Step-by-step interactive explanation of how a decision tree picks its splits.

Scroll-driven visual essay on fitting a line, loss, and gradient-based training.

Interactive walk-through of neurons, layers and activation in a small network.

Interactive illustration of precision, recall and how they trade off.

Visual essay on how bagging many trees makes a random forest.

Move a classification threshold and see the ROC curve and AUC respond.

Uses area models to show multiplication and factoring of whole numbers.

Places masses on a plank to balance it and discover the lever principle.

Balances scales to build intuition for solving equations.

Explores fractions with shapes, number lines and matching games.

Feeds numbers or pictures through a function machine to infer the rule.

Shows how slope and intercept shape a line, with challenges for slope-intercept and point-slope forms.

Compares paint mixes and necklaces to explore ratios and proportional reasoning.

Learn to play drums with a collection of popular grooves shown in groove notation with playback.

Interactive web app for ear training that plays tones and checks your answers.

Block and JavaScript editor for micro:bit programs with an on-screen simulator.

Block and JavaScript editor for building retro games that run in the browser or on handheld hardware.

Build and simulate analog and digital circuits with animated current and voltage.

Chinese junior-high math lab with 24 draggable, slider-driven formula modules and local progress tracking in one offline file.